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Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: f5f84daefcd92d7a630066635ecea1433ed5eac7 > commit: be2823854e00558f46f5bbb124bb3f3a3bb9a94a [6294/10910] ASoC: SOF: amd: add SoundWire PM ops for ACP7.B/7.F > config: i386-randconfig-2200-20260927 (https://download.01.org/0day-ci/archive/20260927/202609271355.u0pymQoF-lkp@intel.com/config) > compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1) > smatch: v0.5.0-9187-g5189e3fb > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Reported-by: Dan Carpenter > | Closes: https://lore.kernel.org/r/202609271355.u0pymQoF-lkp@intel.com/ > > New smatch warnings: > sound/soc/sof/amd/acp.c:1469 handle_amd_sof_acp7x_sdw_pme_event() error: buffer overflow 'adata->sdw->pdev' 2 <= 3 ++ Thank you for the report. This smatch warning is reported because the ACP7.B/7.F SoundWire specific patches have not yet landed. Those patches add support for 4 SoundWire manager instances and allocate the platform device array based on the maximum instance count, which resolves the buffer overflow concern flagged here. We are currently waiting for the dependent patch series to complete upstream review: https://lkml.org/lkml/2026/9/17/1422 https://lkml.org/lkml/2026/9/17/2552 If the review of the above series takes longer, we will post the ACP7.B/7.F SoundWire patches for upstream review independently and include a note in the cover letter documenting the patch series dependency. > > Old smatch warnings: > sound/soc/sof/amd/acp.c:663 sof_amd_handle_acp7x_sdw_wake_event() error: buffer overflow 'adata->sdw->pdev' 2 <= 3 > sound/soc/sof/amd/acp.c:666 sof_amd_handle_acp7x_sdw_wake_event() error: buffer overflow 'adata->sdw->pdev' 2 <= 3 > sound/soc/sof/amd/acp.c:1472 handle_amd_sof_acp7x_sdw_pme_event() error: buffer overflow 'adata->sdw->pdev' 2 <= 3 > > vim +1469 sound/soc/sof/amd/acp.c > > be2823854e0055 Vijendar Mukunda 2026-09-10 1440 static void handle_amd_sof_acp7x_sdw_pme_event(struct snd_sof_dev *sdev) > be2823854e0055 Vijendar Mukunda 2026-09-10 1441 { > be2823854e0055 Vijendar Mukunda 2026-09-10 1442 struct acp_dev_data *adata; > be2823854e0055 Vijendar Mukunda 2026-09-10 1443 struct amd_sdw_manager *amd_manager; > be2823854e0055 Vijendar Mukunda 2026-09-10 1444 u32 sdw_pme_stat; > be2823854e0055 Vijendar Mukunda 2026-09-10 1445 u32 sdw_wake_en; > be2823854e0055 Vijendar Mukunda 2026-09-10 1446 u32 pme_reg; > be2823854e0055 Vijendar Mukunda 2026-09-10 1447 u32 wake_mask; > be2823854e0055 Vijendar Mukunda 2026-09-10 1448 unsigned int instance; > be2823854e0055 Vijendar Mukunda 2026-09-10 1449 > be2823854e0055 Vijendar Mukunda 2026-09-10 1450 adata = sdev->pdata->hw_pdata; > be2823854e0055 Vijendar Mukunda 2026-09-10 1451 if (!adata->sdw) > be2823854e0055 Vijendar Mukunda 2026-09-10 1452 return; > be2823854e0055 Vijendar Mukunda 2026-09-10 1453 > be2823854e0055 Vijendar Mukunda 2026-09-10 1454 for (instance = 0; instance < ACP7X_SDW_MAX_MANAGER_COUNT; instance++) { > be2823854e0055 Vijendar Mukunda 2026-09-10 1455 pme_reg = ACP7X_SW_PME_STS + (instance * 4); > be2823854e0055 Vijendar Mukunda 2026-09-10 1456 wake_mask = ACP7X_SW_WAKE_EN_MASK << instance; > be2823854e0055 Vijendar Mukunda 2026-09-10 1457 > be2823854e0055 Vijendar Mukunda 2026-09-10 1458 sdw_pme_stat = snd_sof_dsp_read(sdev, ACP_DSP_BAR, pme_reg); > be2823854e0055 Vijendar Mukunda 2026-09-10 1459 if (!sdw_pme_stat) > be2823854e0055 Vijendar Mukunda 2026-09-10 1460 continue; > be2823854e0055 Vijendar Mukunda 2026-09-10 1461 > be2823854e0055 Vijendar Mukunda 2026-09-10 1462 mutex_lock(&adata->acp_lock); > be2823854e0055 Vijendar Mukunda 2026-09-10 1463 sdw_wake_en = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP7X_SW_WAKE_EN); > be2823854e0055 Vijendar Mukunda 2026-09-10 1464 sdw_wake_en &= ~wake_mask; > be2823854e0055 Vijendar Mukunda 2026-09-10 1465 snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP7X_SW_WAKE_EN, sdw_wake_en); > be2823854e0055 Vijendar Mukunda 2026-09-10 1466 mutex_unlock(&adata->acp_lock); > be2823854e0055 Vijendar Mukunda 2026-09-10 1467 snd_sof_dsp_write(sdev, ACP_DSP_BAR, pme_reg, sdw_pme_stat); > be2823854e0055 Vijendar Mukunda 2026-09-10 1468 > be2823854e0055 Vijendar Mukunda 2026-09-10 @1469 if (!adata->sdw->pdev[instance]) > ^^^^^^^^^^^^^^^^^^^^^^^^^^ > Feels like a bug. AMD_SDW_MAX_MANAGER_COUNT(2) vs ACP7X_SDW_MAX_MANAGER_COUNT(4) > > be2823854e0055 Vijendar Mukunda 2026-09-10 1470 continue; > be2823854e0055 Vijendar Mukunda 2026-09-10 1471 > be2823854e0055 Vijendar Mukunda 2026-09-10 1472 amd_manager = dev_get_drvdata(&adata->sdw->pdev[instance]->dev); > be2823854e0055 Vijendar Mukunda 2026-09-10 1473 if (amd_manager) > be2823854e0055 Vijendar Mukunda 2026-09-10 1474 pm_request_resume(amd_manager->dev); > be2823854e0055 Vijendar Mukunda 2026-09-10 1475 } > be2823854e0055 Vijendar Mukunda 2026-09-10 1476 } > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki